This Website is ready for IP6

So what does this mean?

The current internet protocol IPv4 uses a 32-bit system, IPv6 is based on 128-bit addresses. The growth of the Internet has mandated a need for more addresses than is possible with IPv4. IPv6 allows for vastly more addresses.

When does IPv4 will disappear?

It will take a very long time before IPv4 goes away. Existing devices and networks connected to the Internet through IPv4 addresses will continue to work as they do now. In fact, IPv4-based networks are expected to co-exist with IPv6-based networks at the same time.